Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-03T05:34:47.177Z Has data issue: false hasContentIssue false
  • English
  • Français

Blood-urea concentration in relation to protein utilization in the ruminant

Published online by Cambridge University Press:  27 March 2009

D. Lewis
D. Lewis
Affiliation:
A.R.C. Institute of Animal Physiology, Babraham, Cambridge
Get access Rights & Permissions [Opens in a new window]

Extract

1. It has been shown that under a given feeding régime the concentration of blood urea in the sheep is constant.

2. Changes in the diet lead to different levels of blood-urea concentration which can be correlated with different rumen-ammonia concentrations; the change in blood-urea concentration follows increases or decreases in rumen ammonia after a delay period of 4–8 hr.

3. Fluctuations in blood-urea concentration in the sheep are not primarily due to changes in the overall nitrogen intake.

4. It is suggested that these findings might form the basis of a supplementary test in assessing the value of the protein in a foodstuff for ruminants.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 48 , Issue 4 , April 1957 , pp. 438 - 446
Copyright
Copyright © Cambridge University Press 1957

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Annison, E. F., Chalmers, M. I. & Synge, R. L. M. (1954). J. Agric. Sci. 44, 270.Google Scholar
Annison, E. F., Hill, K. J. & Lewis, D. (1955). Biochem. J. 60, xix.Google Scholar
Chalmers, M. I. & Synge, R. L. M. (1954). Advanc. Protein Chem. ix, 93.Google Scholar
Conway, E. J. (1950). Microdiffusion Analysis and Volumetric Error, 3rd ed.London: Crosby Lockwood and Son.Google Scholar
Conway, E. J. & Cooke, R. (1939). Biochem. J. 33, 457.CrossRefGoogle Scholar
Dinning, J. S., Briggs, H. M., Gallup, W. D., Orr, H. W. & Butler, R. (1948). Amer. J. Physiol. 153, 41.Google Scholar
Greatorex, J. C. (1955). Brit. Vet. J. 111, 300.CrossRefGoogle Scholar
Head, M. J. Personal communication.Google Scholar
Kornberg, H. L., Davies, R. E. & Wood, D. R. (1953). Radio-isotope Techniques, vol. 1. London: H.M.S.O.Google Scholar
Lewis, D., Hill, K. J. & Annison, E. F. (1957). Biochem. J. (In the Press.)Google Scholar
Luck, J. M. (1924). Biochem. J. 18, 814.Google Scholar
McDonald, I. W. (1948). Biochem. J. 42, 584.Google Scholar
McDonald, I. W. (1952). Biochem. J. 51, 86.CrossRefGoogle Scholar
McDonald, I. W. (1954). Biochem. J. 56, 120.CrossRefGoogle Scholar
Repp, W. W., Hale, W. H., Cheng, E. W. & Burroughs, W. (1955). J. Anim. Sci. 14, 118.CrossRefGoogle Scholar
Woodman, H. E. (1954). Rations for Livestock. Ministry of Agriculture and Fisheries, Bull. No. 48. London: H.M.S.O.Google Scholar